Direct observation of the spin–orbit coupling effect in magnetic Weyl semimetal Co3Sn2S2

Liu DF, Liu EK, Xu QN, Shen JL, Li YW, Pei D, Liang AJ, Dudin P, Kim TK, Cacho C, Xu YF, Sun Y, Yang LX, Liu ZK, Felser C, Parkin SSP, Chen YL (2022)

Publication Type: Journal article

Publication year: 2022

Journal

npj Quantum Materials Springer Nature

Book Volume: 7

Article Number: 11

Journal Issue: 1

DOI: 10.1038/s41535-021-00392-9

Abstract

The spin–orbit coupling (SOC) lifts the band degeneracy that plays a vital role in the search for different topological states, such as topological insulators (TIs) and topological semimetals (TSMs). In TSMs, the SOC can partially gap a degenerate nodal line, leading to the formation of Dirac/Weyl semimetals (DSMs/WSMs). However, such SOC-induced gap structure along the nodal line in TSMs has not yet been systematically investigated experimentally. Here, we report a direct observation of such gap structure in a magnetic WSM Co3Sn2S2 using high-resolution angle-resolved photoemission spectroscopy. Our results not only reveal the existence and importance of the strong SOC effect in the formation of the WSM phase in Co3Sn2S2, but also provide insights for the understanding of its exotic physical properties.

Involved external institutions

Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) ShanghaiTech University / 上海科技大学 CN China (CN) University of Oxford GB United Kingdom (GB) Diamond Light Source GB United Kingdom (GB) Tsinghua University CN China (CN)

How to cite

APA:

Liu, D.F., Liu, E.K., Xu, Q.N., Shen, J.L., Li, Y.W., Pei, D.,... Chen, Y.L. (2022). Direct observation of the spin–orbit coupling effect in magnetic Weyl semimetal Co3Sn2S2. npj Quantum Materials, 7(1). https://dx.doi.org/10.1038/s41535-021-00392-9

MLA:

Liu, D. F., et al. "Direct observation of the spin–orbit coupling effect in magnetic Weyl semimetal Co3Sn2S2." npj Quantum Materials 7.1 (2022).

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